Temperature diagnostic using photonuclear reactions for hot electrons in laserplasma interactions

The temperature of hot electrons produced in ultra-short ultra-intense laser-plasma interactions could be measured by photonuclear diagnostic method. In this paper, the process of bremsstrahlung gamma photons generated by hot electrons interacting separately with Cu-63, Ag-107, and C-12, were simulated using the Monte Carlo N-particle transport code (MCNP). According to the different cross-sections, the activities of different samples were calculated. The activity ratios for C-11/Cu-62 andl C-11/Ag-106 were achieved at different electron temperatures. This method can realize the temperature diagnostic of hot electrons in laser-plasma interactions.